Security Hardening

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 We configure firewalls, SELinux or AppArmor, user access controls, auditing tools, and system hardening policies — all tailored to your specific environment. Our goal is to reduce vulnerabilities and safeguard your servers from both internal and external threats.

Security isn’t one-size-fits-all, which is why we take the time to understand your infrastructure, usage patterns, and risk exposure. Based on this, we implement firewall rules using tools like iptables, nftables, or firewalld, and configure mandatory access controls using SELinux or AppArmor to enforce strong security boundaries at the kernel level.

User access is tightly controlled with best-practice configurations, including SSH hardening, key-based authentication, sudo privilege delegation, and account activity monitoring. We ensure that only the right users have access to the right systems — with minimal risk.

For visibility and compliance, we implement auditing tools like auditd or AIDE (Advanced Intrusion Detection Environment) to log and monitor critical system changes. These tools give you a transparent and tamper-resistant record of system activity, which is vital for both security and incident response.

In addition, we apply industry-standard hardening guides (such as CIS benchmarks) to strengthen your Linux systems — disabling unnecessary services, enforcing password policies, securing bootloaders, and more. Our configurations balance tight security with the practical needs of system usability and performance.

At LinuxOnCall, we don’t just secure your system once and forget it — we help build a foundation for long-term protection, ongoing monitoring, and compliance peace of mind.